Wrench.



PATENTED SEPT. 6, 1904. R. A. HAMMOND & F. E. WALDEN.

WRENCH.

on FILED n V. H I I 7? for-6.

Patented September 6, 1904.

UNTTED STATES ATENT FFICE.

ROBERT A. HAMMOND. OF SANIHVICI'I, AND FREDERICK E. \VALDEN, OF'ORCESTER, MASSACHUSETTS, ASSIGNORS, BY DIRECT AND MESNE ASSIGNA IENTS,TO HAMMOND MANUFACTURING COMPANY, OF EAST- PORT, MAINE, A CORPORATION OF)lAlNE.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 769,605, datedSeptember 6, 1904.

Application filed December 18,1903. Se N- 185.'763v (N0 model-) l (11/107mm it 'IIMIVLI/ (nu/merit:

Be it known that we, ROBERT A. Hannoxn, oi Sandwich, 1n the county ofBarnstable, and

FREDERICK E. \VALDEN, of Vorcester, in the county of \Vorcester, Stateof Massachusetts, citizens ot the United States, have invented certainnew and useful Improvements in \Vrenches, of which the following is aspecitication.

Our invention relates to nut and pipe wrenches, and has for its objectto provide a wrench of simple construction in which the movable jaw canbe easily and quickly adjusted on the shank and securely locked whenmoved to the required position and in which the jaw-locking device willbe held fast either in the position which it occupies when locking themovable jaw or when moved in the opposite direction to unlock the sameand permit it to slide freely on the shank.

\Vith these ends in view our invention consists in certain novelfeatures and details of construction, as will be hereinafter fullydescribed and claimed.

In the accompanying drawings, Figure 1 is a side elevation of a wrenchconstructed in accordance with our invention. Fig. 2 is a longitudinalvertical section of the same. Fig. 3 is a transverse section of the sameon the line 3 3 of Fig. 1, showing the position of the jaw-lockingspindle when the movable jaw is locked. Fig. A is a similar sectionshowing the position of the jaw-locking spindle when the movable jaw isunlocked. Fig. 5 is a transverse section on the line 5 5 of Fig. 1. Fig.6 is an enlarged perspective view of the jaw-locking spindle.

1n the said drawings, A represents the shank or stem of the wrench,which is titted to a handle 1/ of any suitable or approved constructionand is provided at its upper end with an integral tixed jaw b.

B is the movable jaw, which slides on the shank A and is bored out inthe direction of its length to form an aperture 0, the walls of whichare divided longitudinally into alternate plain and screw-threadedsections 1O 12,

as shown in Fig. Into this aperture 0 extends an axially-oscillatinglocking-spindle D, which passes through a split bushing 13, 5 screwedinto the lower end of the aperture 0, whereby it is steadied andmaintained at all times in its proper central position within saidaperture. The lower end of the spindle D is supported in a suitablebearing 14:, formed in a laterally projecting portion (Z of thehandle/1, an open slot 15 being formed in the projection (Z, in which isplaced a thumb-wheel 16, eccentrically secured to the spindle D, asshown in Fig. 5, the thumb-wheel so arranged forming a cam which whenturned to oscillate the spindle in either direction will be brought intocontact with the end wall of the slot 15, which thus forms a stop andserves to limit the axial rotation of the spindle to a quarter- 5revolution. The upper end 18 of this spindle, which is slightlyenlarged, is screwthreaded in sections-that is, it is dividedlongitudinally into alternate plain and screwthreaded sections 20 .2 1to correspond with those in the aperture 0 of the movable jaw B, wherebywhen the spindle is turned by the cam-shaped tlnnnb-whcel 16 to thelimit of its movement in one direction, as determined by the contact ofone side of said wheel with the end wall of the slot 15, the threadedsections of said spindle end will register with the plain or unthreadedsections of the walls of the aperture c, as shown in Fig. 4:, when thejaw B will be free to be moved up or down on the shank A and spindle Dto bring it into the desired position with relation to the fixed jaw 1/,after which the spindle is turned a quarterrevolution in the oppositedrection, as again determined by the contact of the opposite side ot'the thumb-wheel 16 with the end wall of the slot 15, which movement ofthe spindle causes its threaded sections to engage the threaded sectionsof the aperture 0, as shown in Figs. 2 and 3, thus securely locking the9 movable jaw in its adjusted position, the locking-spindle being itselflocked in this position, or when at the end of its movement in theopposite direction to unlock the jaw, and thereby prevented frombecoming loose by the l fixed jaw, a movable jaw adapted to slide onbinding of the eccentric thumb wheel 16 said shank and having anaperture the walls against the end wall of the slot 15, as beforedescribed. The pitch or inclination of the screw-threads of thejaw-locking spindle and those of the aperture 0 is very slight, so thatthe quarter-revolution of the spindle in looking the movable jaw willnot affect the distance pf the latter from the fixed jaw to anyappreciable extent.

The above described cam shaped thumbwheel affords an exceedingly simpleand convenient means for accurately determining and limiting theoscillating movement of the spindle and simultaneously locking the samewhen turned to lock or unlock the movable jaw, which is essential to the'quick and easy manipulation of the wrench.

Although the above-described wrench'is especially adapted for nuts andbolts, it will be obvious that our invention may be applied equally aswell to a pipe-wrench by a simplemodification of the jaws to adapt themfor the purpose.

What we claim as our invention, and desire to secure by Letters Patent,is-

1. In a wrench, the combination with a shank having a fixed jaw, of amovable jaw adapted toslide on said shank and having an aperture thewalls of which are divided longitudinally into alternate plain andscrewthreaded sections, an axially-oscillating locking-spindle fittingwithin said aperture of the movable jaw and supported at its lower endin a suitable bearing and having its upper portion dividedlongitudinally into plain and screw threaded sections corresponding tothose in the aperture of the movable jaw, the threaded sections of thespindle being adapted to engage the threaded sections of the saidaperture, means for turning the spindle and limiting its movement ineither direction and means for locking the spindle when at the end ofits movement.

2. A wrench comprising a shank having a of which are dividedlongitudinallyinto alternate plain and screw-threaded sections, anaxially oscillating locking spindle fitting within the aperture of themovable, jaw and supported at its lower end in a suitable bearing andhaving at its upper end alternate plain and screw-threaded sectionscorresponding to those in the aperture of the movable jaw, the threadedsections of the spindle being adapted to engage the threaded sections inthe said aperture, and a cam-shaped thumb-wheel secured to thelocking-spindle and adapted to frictionally engage the adjacent wall ofthe slot in which it is placed to lock said spindle at the limit of itsmovement in either direction.

3. A wrench of the character described, comprising a shank having ahandle and afixed jaw, a movable jaw sliding on said shank and having anaperture the Walls of which are divided longitudinally into plain andscrewthreaded sections, an axially-oscillating locking-spindle fittingwithin said aperture and" mounted in a bearing in the handle andprovided at its upper end with short alternate plain and screw-threadedsections corresponding to those in the aperture of themovable jaw,acannshaped thu mb-wheel fast on the spindle and arranged in a slotformed in aprojection on the handle, the end wall of said slot formingastop to arrest and frictionally hold and lock the cam-wheel and spindlewhen the latter is in position to lock the movable jaw onsaidshank, orwhen said spindle is at the end of its movement in the oppositedirection to release the movable jaw.

Witness our hands this 15th day of December, A. D. 1903.

ROBERT A. HAMMOND. FREDERICK E. WALDEN. In presence of- P. E.TESGHEMACHER. J E. MALoNEY.

